第一种是tensor用exp函数

th> a 1  1  0[torch.DoubleTensor of size 1x3]                                                                      [0.0002s]th> a:exp() 2.7183  2.7183  1.0000[torch.DoubleTensor of size 1x3]

 

th> a=1                                                                      [0.0001s]th> b=math.exp(a)                                                                      [0.0001s]th> b2.718281828459                                                                          [0.0001s]th> a=3                                                                      [0.0001s]th> b=math.exp(a)                                                                      [0.0001s]th> b20.085536923188